Abstract: A novel composition of weatherable and semi-weatherable materials that can be injection molded or extruded into sheets or rolls to create a roofing product wherein the roofing product overlaps in order to provide a substantially weatherable covering on a roof. The roofing product has a top layer (14) made of weatherable polymers and multiple substrate layers (22, 30) made of semi-weatherable polymers. A decorative, three dimensional appearing layer (16) of colorants is uniquely applied to the bottom surface (15) of the top layer (14). The weatherable top layer (14) is preferably an ASA or acrylic-type copolymer. The semi-weatherable bottom layers (22, 30) are specialized formulations of fire resistant polymers, where the semi-weatherable bottom layers (22, 30) have had the Heat Deflection Temperature (HDT) uniquely improved for use in roofing. The product has multi-layering UV stability. The multiple layers can be injection molded or extruded or laminated or preferably multi-layer-extruded, thus bonded.

Abstract: A novel composition of a materials that can be extruded into sheets to form panels to create a roofing system wherein the panels are formed to interlock with like panels in order to provide a substantially weatherproof covering on a roof. The sheet member has a top layer made of ASA (Acrylonitrile/Styrene/Acrylate polymer) and a bottom layer made of PVC (Polyvinylchloride). The two layers are extruded and bonded or preferably coextruded. Then the bonded materials are thermoformed to resemble more popular types of roof coverings such as shake or shingles or tiles.